The question "What is the first name of ADP?" is ambiguous. ADP commonly refers to Adenosine Diphosphate, which is a biochemical compound, not a person. Therefore, it doesn't have a first name. If the question refers to a company named ADP, it stands for Automatic Data Processing. The name Automatic does not refer to a person.
Therefore, based on the common usages of the acronym ADP, the question cannot be directly answered.